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Improve efficiency even further. Introduce the configMAX_SYSCALL_INTERRUPT_PRIORITY feature.

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This commit is contained in:
Richard Barry 2008-07-25 02:33:56 +00:00
parent 3ab4d1f87f
commit 32592e1385
2 changed files with 79 additions and 82 deletions
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38
Source/portable/GCC/ARM_CM3/portmacro.h
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@ -101,35 +101,39 @@ extern void vPortYieldFromISR( void );
/* Critical section management. */
#define vPortSetInterruptMask() \
/*
* Set basepri to portMAX_SYSCALL_INTERRUPT_PRIORITY without effecting other
* registers. r0 is clobbered.
*/
#define portSET_INTERRUPT_MASK() \
__asm volatile \
( \
" push { r0 } \n" \
" ldr r0, =ulKernelPriority \n" \
" ldr r0, [r0] \n" \
" mov r0, %0 \n" \
" msr basepri, r0 \n" \
" pop { r0 } " \
::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY):"r0" \
)
/*-----------------------------------------------------------*/
#define vPortClearInterruptMask() \
__asm volatile \
( \
" push { r0 } \n" \
" mov r0, #0 \n" \
" msr basepri, r0 \n" \
" pop { r0 } " \
/*
* Set basepri back to 0 without effective other registers.
* r0 is clobbered.
*/
#define portCLEAR_INTERRUPT_MASK() \
__asm volatile \
( \
" mov r0, #0 \n" \
" msr basepri, r0 \n" \
:::"r0" \
)
/*-----------------------------------------------------------*/
#define portSET_INTERRUPT_MASK_FROM_ISR() 0;portSET_INTERRUPT_MASK()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) portCLEAR_INTERRUPT_MASK()
extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
#define portDISABLE_INTERRUPTS() vPortSetInterruptMask();
#define portENABLE_INTERRUPTS() vPortClearInterruptMask();
#define portDISABLE_INTERRUPTS() portSET_INTERRUPT_MASK()
#define portENABLE_INTERRUPTS() portCLEAR_INTERRUPT_MASK()
#define portENTER_CRITICAL() vPortEnterCritical()
#define portEXIT_CRITICAL() vPortExitCritical()
/*-----------------------------------------------------------*/